Evaluate -x+4x when x=-2

Mathematics

2 answers:

snow_lady [41]3 years ago

8 0

Use the substitution method

-x+4x when x=-2

-(-2)+4(-2) Positive number * ( multiplying)Negative number=Negative number

2-8

=-6

Answer is -6

xenn [34]3 years ago

3 0

The answer is -6. The explanation is shown in the picture.

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Read 2 more answers

Rewrite y = -(x + 2)2 – 5 in standard form.

xenn [34]

Answer:

y = - x² - 4x - 9

Step-by-step explanation:

Given

y = - (x + 2)² - 5 ← expand (x + 2)² using FOIL

= - (x² + 4x + 4) - 5 ← distribute parenthesis by - 1

= - x² - 4x - 4 - 5 ← collect like terms